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One-dimensional mirror image synthetic aperture radiation imaging method

A comprehensive aperture and radiation imaging technology, applied in the direction of re-radiation, radio wave reflection/re-radiation, instruments, etc., can solve problems such as huge data volume, limited system performance, complex system structure and signal processing, etc., to reduce structure The complexity and the effect of reducing the complexity of signal processing

Inactive Publication Date: 2011-06-08
HUAZHONG UNIV OF SCI & TECH +1
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Problems solved by technology

However, this advantage is at the cost of system structure and signal processing complexity, especially for large-scale synthetic aperture systems such as spaceborne synthetic aperture radiometers. Due to the large number of array elements, the system structure and signal processing will be very complicated. The amount of data is also an important issue that cannot be ignored
These factors limit the further improvement of system performance

Method used

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] The present invention utilizes the relationship between the correlation output, cosine visibility, and scene brightness temperature (brightness temperature) distribution, solves the cosine visibility by solving linear equations, and then reconstructs it by inverse cosine transformation or by solving the generalized inverse matrix of the impulse response matrix The scene brightness temperature distribution, the specific principle is as follows:

[0033] Set up a reflective surface perpendicular to the antenna array, so that the radiation signal of the scene under test is received by the antenna array through two paths. The first path is that the radiation signal is directly received by the antenna array, and the second path is that the radiation signal is reflected by the reflection surface and is received Antenna array reception.

[0034] refer to fi...

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Abstract

The invention provides a one-dimensional mirror image synthetic aperture radiation imaging method. The method comprises the following steps of: constructing a linear equation set by utilizing the relation among relevant output, the cosine visibility and the scene brightness temperature distribution, solving the linear equation set to obtain a cosine visuality; and then reconstructing scene brightness temperature distribution through a mode of carrying out anti-cosine transformation or solving a generalized inverse matrix of an impulse response matrix. In the invention, the imaging performance of a traditional synthetic aperture imaging system with a large array element number is acquired by using a small array element number, thereby the complexity of the structure of the traditional synthetic aperture imaging system and the complexity of signal processing are effectively reduced.

Description

technical field [0001] The invention relates to the technical field of microwave remote sensing and detection, in particular to a method for reconstructing a one-dimensional mirror synthetic aperture image. Background technique [0002] The synthetic aperture radiometer uses multiple discrete small antennas to synthesize a larger real aperture, which is arranged in a sparse array, which greatly reduces the mass and volume of the antenna, and solves the inherent contradiction between resolution and aperture size. However, this advantage is at the cost of system structure and signal processing complexity, especially for large-scale synthetic aperture systems such as spaceborne synthetic aperture radiometers. Due to the large number of array elements, the system structure and signal processing will be very complicated. The amount of data is also an important issue that cannot be ignored. These factors limit the further improvement of system performance. Contents of the inven...

Claims

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Application Information

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IPC IPC(8): G01S7/02G01S13/90
Inventor 李青侠李浩陈良兵吕容川靳榕段崇棣
Owner HUAZHONG UNIV OF SCI & TECH
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